Used as a key intermediate in the synthesis of quinazoline-type diuretic drugs, particularly in the production of bendroflumethiazide and related thiazide diuretics. It plays an essential role in forming the core structure of these medications, which are widely prescribed for hypertension and edema. The compound's functional groups allow for selective chemical modifications necessary to achieve therapeutic activity in the final drug substance. Its stability and reactivity profile make it suitable for large-scale pharmaceutical manufacturing processes.